﻿<p>The <em>IfcLanguageId</em> identifies the language in which a natural language text is expressed. It uses a language tag to identify the language.</p>

<blockquote class="note">NOTE&nbsp; The tag shall comply to the Internet Engineering Task Force (IETF) language tag as expressed in RFC 5646. A conforming program shall support the "simple language" subtag and the "language-region" tag format.</blockquote>

<blockquote class="example">
EXAMPLE&nbsp; for simple language tags en (English), de (German), fr (France), or ja (Japanese), and for language-region tags en-US (English as used in United States), de-CH (German as used in German speaking part of Switzerland).
</blockquote>

<p>Type: <em>IfcIdentifier</em></p>

<blockquote class="note">
NOTE&nbsp; See <a href="../../../bibliography.htm#RFC-5646">RFC 5646</a> for definition of language tag.
</blockquote>
<blockquote class="history">
HISTORY&nbsp; New defined datatype in IFC4.
</blockquote> 